Got mine Tuesday. Plenty of scratches on the slide, but I think I can polish most of them out. The gun has enough sand and other gunk inside that I'm surprised you only had a few FTEs. I think after a good cleaning it should roll.
I ordered a few Mec-Gar magazines from Greg Cote here.
Greg was not sure if they fit the Bul M5 standard commander model, but did said he'd had other buyers use them successfully with the Bul M5 IPSC. If they don't fit, from what I have read the P18 magazines can be filed to lock in with the regular Bul magazine catch. I'll give it a try and see what happens.
There's also a replacement magazine catch
from CR Speed/Rescomp that I believe will allow P18 magazines to lock in. Haven't confirmed that yet.
I like the feel of this gun. The grip doesn't seem much thicker than a Hi-power, just longer. Hoping to get out and shoot this thing over the weekend.